From 8659f317d3303092d8e534eeefd160aa5ead9aab Mon Sep 17 00:00:00 2001
From: Lukas Straub <lukasstraub2@web.de>
Date: Mon, 28 Dec 2020 16:08:59 +0100
Subject: [PATCH] io: Document qmp oob suitability of qio_channel_shutdown and
io_shutdown
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Migration and yank code assume that qio_channel_shutdown is thread
-safe and can be called from qmp oob handler. Document this after
checking the code.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <32b8c27e256da043f0f00db05bd7ab8fbc506070.1609167865.git.lukasstraub2@web.de>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
include/io/channel.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/io/channel.h b/include/io/channel.h
index 4d6fe45f63d..ab9ea779598 100644
--- a/include/io/channel.h
+++ b/include/io/channel.h
@@ -92,7 +92,8 @@ struct QIOChannel {
* provide additional optional features.
*
* Consult the corresponding public API docs for a description
- * of the semantics of each callback
+ * of the semantics of each callback. io_shutdown in particular
+ * must be thread-safe, terminate quickly and must not block.
*/
struct QIOChannelClass {
ObjectClass parent;
@@ -510,6 +511,8 @@ int qio_channel_close(QIOChannel *ioc,
* QIO_CHANNEL_FEATURE_SHUTDOWN prior to calling
* this method.
*
+ * This function is thread-safe, terminates quickly and does not block.
+ *
* Returns: 0 on success, -1 on error
*/
int qio_channel_shutdown(QIOChannel *ioc,
--
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